Complementarity between nonstandard Higgs boson searches and precision Higgs boson measurements in the MSSM

Marcela Carena, Howard E. Haber, Ian Low, Nausheen R. Shah, and Carlos E. M. Wagner
Phys. Rev. D 91, 035003 – Published 3 February 2015

Abstract

Precision measurements of the Higgs boson properties at the LHC provide relevant constraints on possible weak-scale extensions of the Standard Model (SM). In the context of the minimal supersymmetric Standard Model (MSSM) these constraints seem to suggest that all the additional, non-SM-like Higgs bosons should be heavy, with masses larger than about 400 GeV. This article shows that such results do not hold when the theory approaches the conditions for “alignment independent of decoupling,” where the lightest CP-even Higgs boson has SM-like tree-level couplings to fermions and gauge bosons, independently of the nonstandard Higgs boson masses. The combination of current bounds from direct Higgs boson searches at the LHC, along with the alignment conditions, have a significant impact on the allowed MSSM parameter space yielding light additional Higgs bosons. In particular, after ensuring the correct mass for the lightest CP-even Higgs boson, we find that precision measurements and direct searches are complementary and may soon be able to probe the region of non-SM-like Higgs boson with masses below the top quark pair mass threshold of 350 GeV and low to moderate values of tanβ.

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  • Received 31 October 2014

DOI:https://doi.org/10.1103/PhysRevD.91.035003

© 2015 American Physical Society

Authors & Affiliations

Marcela Carena1,2,3, Howard E. Haber4,5, Ian Low6,7, Nausheen R. Shah8, and Carlos E. M. Wagner2,3,6

  • 1Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, Illinois 60510, USA
  • 2Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA
  • 3Kavli Institute for Cosmological Physics, University of Chicago, Chicago, Illinois 60637, USA
  • 4Santa Cruz Institute for Particle Physics, University of California, Santa Cruz, California 95064, USA
  • 5Ernest Orlando Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720, USA
  • 6High Energy Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
  • 7Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208, USA
  • 8Michigan Center for Theoretical Physics, University of Michigan, Ann Arbor, Michigan 48109, USA

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Issue

Vol. 91, Iss. 3 — 1 February 2015

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